ninn Entry Vehicle systems and Technology Meeling J WILLIAMSBURG, VIRGINIA/DECEMBER 3-5, 1968 -First publication tiahti reserved by American lnrtituls of Asronovlici and A%lronauliCI. 1290 Avenue Of the Amsricor, New York, N. Y. lWl9 Abstracts may be published rilhoul psrmirrion if credit i s given to author and to AIAA. (Price: AIAA M e m b e r $1.00. N o n m e m b e r I1.MlDownloaded by KUNGLIGA TEKNISKA HOGSKOLEN KTH on July 30, 2015 | http://arc.aiaa.org | Abstract The development of t h e Apollo t h e m l -p r o t e c t i o n system i s presented chronologically and includes a discussion of the avenues explored, the problems encountered, and the rationale which resulted i n a blunt vehicle protected by a low-density ablator i n a honeyccmb matrix bonded t o a s t e e l sandwich structure. l y t i c a l etudies were performed t o support t h i s development.provide data at extreme conditions within the f l i g h t corridor, and t h e r e s u l t s of these f l i g h t s were used t o verify system perfonnance and t o refine. predict i o n capability. and manufacturing considerations often outweigh thermal-performance considerations i n system design, t h a t many important-appearing problems a r e not significant, and t h a t the technology gained i n the Apollo Prograa forme a r e l i a b l e base for t h e development of future thermal-protection systems.mtensive ground and f l i g h t t e s t s and ana-A f l i g h t t e s t program was designed t o It is concluded t h a t s t r u c t u r a l

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The results of a calibration and intercomparison of hailpads performed at the Workshop is presented, and recommendations are made on future calibration work and on international cooperation for obtaining comparable measurements of hailfall characteristics.RÉSUMÉ Les résultats d'une calibration et d'une intercomparaison de grélimètres plastiques, faites à l'Atelier, sont présentés et des recommendations sont faites sur de futures calibrations et sur la coopération internationale requise pour obtenir des mesures comparables des caractéristiques physiques de la grêle.

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